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PSYC 2101: statistic in social science

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Start Assignment 4 only after you have completed Part IV, Correlations and Regression. Use all of the information provided in the textbook and the Study Guide. This assignment is worth 100 points and contributes 8% towards your final grade.Please show your solution step by step on each problem to receive partial points for wrong answers.Question 1 Briefly and concisely discuss in your own words the following: a.Explain the three characteristics of a correlation. b.Describe an example of each of the four uses of correlation.c.Compare Pearson correlation with Point-biserial correlation and give anexample of each. d.Give a concrete example of a linear relationship and identify from theexample the specific values of the two constants y-intercept (a) and slope ofthe line (b) Question 2An educational psychologist would like to know the relationship between the number of hours per week that students study for a course and their performance in the test.a.Compute the Pearson correlation of the data below.

2Assignment 4TRU Open Learningb.Determine the significance of the correlation at α .05, two-tailed by referring to Table B.6in the Appendix of your textbook. State whether the correlation is significant.No. of Hours of StudyTest Score88410907856715734689861292670880Question 3 The educational psychologist in Question 2 above wanted to confirm the Pearson correlation that he obtained by ranking the number of hours of study and the test scores. He then computed the Spearman correlation. Using the data in Question 2 above:A) Do as the psychologist did ,and B) show whether his conclusion regarding the significance of the Spearman correlation is similar to his conclusion regarding the Pearson correlation. (After computing the Spearman correlation, refer to Table B.7in the Appendix of your textbook.) Question 4 A sports psychologist wanted to find out whether there is a relationship between drinking coffee and speed in running a 5k run. He recorded the time (in minutes) of 5 coffee drinkers competing in the marathon as follows: 27, 25,23, 24, 26, and 5 non-coffee drinkers also competing in the same marathon as follows: 28, 24, 13, 21, 20. Convert these data into a form suitable for the point-biserial correlation, and assign a score of 0 to the non-coffee drinkers and a 1 to the coffee drinkers. A) Compute the point biserial correlation ),and B) compute the coefficient of determination (r2) and describe how much of the variability in marathon speed is determined by its association with drinking coffee. Question 5 A human resources manager wishes to determine whether there is a relationship between having a bachelor’s degree and being promoted within the first two years of employment in their company.

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Tellus molestie nunc non blandit massa enim nec dui. Tellus molestie nunc non blandit massa enim nec dui. Ac tortor vitae purus faucibus ornare suspendisse sed nisi. Pharetra et ultrices neque ornare aenean euismod. Pretium viverra suspendisse potenti nullam ac tortor vitae. Morbi quis commodo odio aenean sed. At consectetur lorem donec massa sapien faucibus et. Nisi quis eleifend quam adipiscing vitae proin sagittis nisl rhoncus. Duis at tellus at urna condimentum mattis pellentesque. Vivamus at augue eget arcu dictum varius duis at. Justo donec enim diam vulputate ut. Blandit libero volutpat sed cras ornare arcu. Ac felis donec et odio pellentesque diam volutpat commodo. Convallis a cras semper auctor neque. Tempus iaculis urna id volutpat lacus. Tortor consequat id porta nibh.

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GR503 Numerical Methods in Finance

Make an Excel spreadsheet that calculates a) the linear interpolated volb) the polynomial interpolated vol using Neville’s algorithm2c) the cubic spline interpolated vol 3 for any given delta that lies between the smallest and largest delta In particular, calculate the value of the vol that co ...

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POL 660 Research Methods

Task: Answer the following:   1.)  (5 points) For the hypothesis below, identify the following:  dependent variable, independent variable, unit of analysis, and direction of the relationship (positive or negative).  The higher a country’s unemployment rate, the higher ...

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M140 Introducing Statistics

Task Data Science Analysis of a topic of your choice on Twitter Use Mozdeh to collect at least 1500 tweets about a topic of your choice and report the following: 1. The goal of the project (must be to find out about a topic from Twitter) and the queries used, including a justification of the choi ...

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